js代码实现调起微信客户端

function openWx(){

     locatUrl = "weixin://";

     if(/ipad|iphone|mac/i.test(navigator.userAgent)) {

        var ifr =document.createElement("iframe");

        ifr.src = locatUrl;

        ifr.style.display = "none";

        document.body.appendChild(ifr);

     }else{

        window.location.href = locatUrl;

     }

}